Initially, some people were concerned that the use of the hashtag # in the URL would cause issues with web analytics tracking, but Google found a way to make sure that the referrer data would still be valid (albeit different) when visitors click on a results link. This is what the new referrer string looks like:

In December 2009 I estimated the proportion of these new Google organic referrers to be 10%. It looks like that this proportion has now been bumped up to 20% since early February 2010:

So, how is this information actionable? I will admit that I primarily just wanted to make this observation about the referrer change rollout, but one thing you can do with the new referrer format is find out the exact search results ranking.